Method of and apparatus for coating strips



Nov. 6, 1945. w. P. o S'GOOD METHOD oPAND APPARATUS FOR coATIN sTRIPs 4sneetsfsheet 1 l Filed Aug. 20,- 1941 Nov. 6, 1945. w. P. osGooD2,388,494

l METHOD OF AND APPARATUS FOR COATING STRIPS I .I

Filed Aug. 2o, 1941 4 sheets-sheet 2 y QMWM/ g Nov. 1945. w R OSGOOD:2,338,494

METH'OD oF AND APPARATUS vFOR coATING STRIPS Filedl Aug. 2o, 1941 4sheets-'sheet s Lve Bmw v a@ @M -Nov. 6, 1945. w. PfosG'ooD 2,338,494 VMETHOD OF AND PPARATUS FOR COATING STRIPS Y 4 sheetssheet 4 PatentedNov. 6, 1945 I UNITED STATES PATENT OFFICE METHOD F AND APPARATUS FORCOATING STRIPS Waiter P. Osgood, Malden, Mass., assignor to BostonMachine Works Company, Lynn, Mass., a corporation of Massachusetts yApplication August20, 1941, Serial No. 407,593 Claims. (Ci. 117-68) tostrips of braided or plaited jute strands such' 5 as are used in makingrope soles for shoes. Such strips have. in the past, been made intosoles by being folded and wound upon themselves and then stitched sothat the sinuous opposite edges of the strip form the surfaces of thesole. More l0 Y recently, the convolutions of each strip have beencemented together in order to save time in manufacturing soles. A

In forming a rope sole for a shoe of a givenfl size and width, a denitelength of strip is re- 15 quir 'I'he proper length is cut off from astrip of indeterminate length and is folded or wound upon itself insuccessive jconvolutions in such a manner as to form the-proper shapefor a shoe sole. together, the faces of the strip are coated with asuitable cement, such as a latex preparation,

the strip being folded and wound into the form of a sole whilethlscement is still in its adhesive state. 'It is desirable'that the nal orouter con- 25 volution of the sole have its outer face free from cementsince such outer face constitutes the boundary edge of the sole itself.

It is an object of the present invention to opposite faces of a. strip,the coating on one of these faces being interrupted at predeterminedintervals so as to leave an uncoated area-on one face which will be theuncoated outer edge of'a shoe sole afterthe strip has been wound intothe shape of a sole.

As it is also desirable that the faces of the `rope sole be free fromcement, the apparatus hereinafter described is preferably formed toapply to each coated face of the strip a band of coating material orcement which is narrower than the width of the strip itself, so that itdoes not extend to either edge of the strip.

It is a further object of the invention to provide apparatus for thepurpose described which is arranged in such a way as to economize on1100xspace and which is easily set up. operated and adjusted.

For a more complete understanding of the invention, reference may be hadto the following description of certain embodiments thereof and to thedrawings, of which- Figure 1 is an end elevation of an apparatusembodying the invention; v

- Figure 2`is a plan view ofthe same:

In order to hold the convolutions 20 Figure 3 is a sectional view onlines H of Figures 1 and 2; Figure 4 is a fragmentary, sectional view online 4-4 of Figure 2 showing the strip supporting wheel in a diiferentposition vfrom that shown in Figure 3;

Figure 5 is a fragmentary, sectional view on' line '5 5 of Figure 4; and

Figure 6 is a fragmentary elevation oi' a portion of the apparatus shownin Figure i, on a larger scale.

The apparatus may -be mounted on a suitable base l0 and 'may comprise acasting it which may be of hollow'r box-like formation for use as areservoir for certain kinds of liquid coating materials. In the presentinstance, however, a pool of latex cement is preferably maintained in areceptacle I4 by connection through a pipe i6 to a suitableconstant-level source (not shown) such as an inverted bottle supportedwith its mouth in a pool communicating with the pipe I6. Partiallysubmerged in the pool of cement in the receptacle I4 is a coating rollIt which, as indicated in Figure 5, may be provided with apair ofcylindrical coating elements 20 and 22, which are axially spaced. Asshown, these elements are of greater diameter than the remainder of theroll and are preferably nar..

rower than the width yof the strip 24 which is provide apparatus forapplying coating to both 30 to be coated.

Directly over the coating element 20 is mounted a strip-supporting wheelor disk 30 having a periphery approximately of the same width as that ofthe strip 24. The circumference of the wheel 30 is made equal to thelength of stripl pressed against the latter so as to ensure positivekissing engagement therewith, whereby a film of cement is transferredfrom the element 20 to the under face of the strip 24. A doctor 28 ismounted adjacent to the peripherles of the elements' 20 and 224toregulate the thickness of the films of cement carried thereby. A portion32 of the periphery of the wheel 30 is inwardly offset, so that whenthis portion of the periphery is opposite the element 20, the spacing isconsiderably greater than the thickness of the strip, as indicated inFigure 4. 'I'he length of the offset portion 32 of the periphery isdetermined by the length of strip required forthe outermost convolutionof the strip when made of coating applied to the strip by the element20, these gaps being equal in length to the onset portion 32 of theperiphery of the wheel 30.

. The guide wheel 30 may be supported by any suitable means such as apair of standards having a vertically adjustable cross-bar 40 in whichis journalled a shaft 42 for the' wheel 30. Suitable means, such as apair of screws 44, supported by brackets 46 on the standards 36, may beprovided for holding the wheel 30 in its vertically adjusted position.The wheel 30 is easily replaceable .bysimilar wheels of differentdiameters according to the different lengths of strip required for shoesoles of various sizes.

After one face of the strip 24 has been coated, as hereinbeforedescribed, it is desirable to apply coating to the opposite face. Tothis end, the

strip is led around the periphery of the wheel 30,

element 20, with its after passing the coating uncoated face in'contactwith the wheel. As

peripheryr of the pulley 50. lowermost point of the guide most point ofthe wheel 30. As shown in Figures -1 and 2, the guide pulley 50 isoffset from the plane of the wheel 30 sufficiently to guide the strip 24in a path parallel to the portion of -the strip, approaching thenipbetween the element and the wheel 30. In passing from the idle guidepulley 50 to the coating element 22 of the roll I8, the strip 24 istwisted through a half turn, so that when it uncoatedside will bepresented to this element to receive the coating therefrom. Directlyabove the coating element 22 is a suitable feed wheel 52 which, asindicated in Figure 5, is preferably provided with a knurled peripheryhaving a series of points 54 adapted to sink into the face of the stripso as to ensure a positive feeding of the strip. The feed wheel 52 ismounted on a driven shaft 56 which is supported by an arm 50, which isrockable to raise the feed wheel clear of the strip 24.

As shown in Figure 1, a gear wheel 62 is mounted on the shaft 58, thisgear wheel meshing with a gear wheel 54 mounted on a shaft 66 which alsocarries a pulley wheel 58. The shaft 55 extends across the casting I2and .drives the coating roll I8. The pulley 6I is connected by asuitable train of belts and pulleys, indicated generally at 10, to apulley 12 mounted on the shaft of a suitable motor 14 supported on aframe 15, or to any other suitable source of power. The pulleys in thetrain 10 can be readily replaced, if desired, by pulleys of differentsizes to'alter the speed ratios between the motor and the shafts whichdrive the feed wheel 52 and the coating rolli.

The arm 50 is rockable about a pivot l0 to permit the operator to liftthe feed wheel 52 clear of the strip 2 4. The arm 50 isnormally pressedtoward its operative position by its own weight and also by a coiledspring I2. The space between the feed wheel and the coating element 22termined by an adjustable stop element i4 carried by the arm Il.

of the wheel lll. Hence, when the the strip 24 passes from theA o wheelto a tilted, idle, guide` reaches the element 22, its

is dethe engagement of one ofsaid The casting I2 may be provided with aremovable cover 85 which is rockable about the pivot 80 and is normally'held in its closed position by a pair of screws and thumb nuts 88. Whenthe cover is swung upward, an abutment element Il thereon supports theshaft 58 and its arm 80.

. Suitable guides 50 are provided to ensure proper registration of thestrip 24 with the periphery of the wheel 30. Guides 92 are also providedto maintain the strip properly aligned between the feed wheel suitableguide 94 may the strip 24 as it comes nip between the wheel 15 ment 20.

I claim:

1. A method of Boating strip material on both sides, which compriseslcontinuously feeding a strip of indeterminate length in the form of aalso be provided from a bale toward the 3o and the coating eleo thestrip at a point near the beginning of the loop, twisting the travelingstrip through a halfturn, and applying coating material to the oppositeface of the strip at a point beside the point Where the first coating isapplied.

' 2. A method of coating both sides of strip material, which comprisesfeeding continuously a strip of indeterminate length, applying a film ofliquid intermittently to the under face of said strip at a predeterminedpoint in its travel, leading the'. strip thence in a loop and twistingit through a half-turn to invert the same, and thereafter applying a tothe under face of said strip at a location adjacent to that at which thefirst film is applied.

3. A method of partially coating strip material, which comprises feedinga strip of indeterminate length pasta coating station with one face ofthe strip lowermost, intermittently applying coating material to thelowermost face of said strip at said coating station,

.to describe a loop and :twist a half-turn so as to return to saidstation with its other face lowermost. and continuously applying coatingmaterial to said other face at said station. l

4. Apparatus for coating a strip, comprising a coating device, means forcontinuously feeding a strip, means for guiding said strip past saiddevice with one face in operative contact therewith, means forseparating said traveling strip from said device at .predeterminedintervals whereby spaced portions of the strip remain untreated by saiddevice, means for guidimz said strip back to said device through a pathof predetermined length, and means for presenting the other face of saidstrip for operative contact with said device.

5. Apparatus for coating a strip, comprising a coating roll, means forfeeding a strip of indew terminate length past and in contact with saidroll to apply coating to one face of said strip, means for. guiding saidstrip to present its other face for engagement with said roll, an'dmeans for periodically interrupting the contact of 'one of 05 said faceswith said roll.

p '6. Apparatus for coating a strip, comprising a coating roll rotatableabout a horizontal axis, means for feeding a strip horizontally with itsunder face in kissing engagement with the top of the roll, means forguiding said strip in a loop path to present the other side thereof forkissing engagement with said roll, and`means for periodicallyinterrupting faces with said 'Il roll.

52 and the coating element 22. A

to guidev loop, applying coating material to one face of film of liquidcontinuously causing said strip of indeterminate length 1. Apparatus forcoating a strip, comprising a coating roll rotatable about a horizontalaxis, a rotatable guide wheel above said roll having a periphery ofpredetermined length and an axis of rotation parallel to that of saidroll, said wheel being spaced above said roll by approximately the`thickness of said strip, means for feeding said strip between said rolland wheel whereby said strip is pressed into positive contact with saidroll to receive coating on one iace thereof, said wheel having a portionof its periphery inwardly offset for periodic interruptions in thecontact of said face of the strip with said coatim roll, and means forguiding said strip back to said roll to present the other face forcontact with said roll.

8. Apparatus for coating a strip, comprising a coating roll rotatableabout a horizontal axis, said roll having two axially spaced cylindricalelements for applying coating, a guide wheel mounted over one of saidelements, a 'feed wheel mounted ovei` the other said element, saidwheels being spaced above said elements just enough to permit feedingthe strip between them, said guide wheel having la portion of itsperiphery inwardly oset to permit periodic disengagement of the. 4stripfrom the roll element 'beneath the guide wheel, and means for twistingthe strip through usI half a turn as it leaves the guide wheel so as topresent the other tace of the strip to the roll element beneath the feedwheel.

9. Apparatus for coating a strip, comprising a coating roll rotatableabout an axis, a guide wheel rotatable about a parallel axis andspacedfrom said roll by a distance substantially equal to the thickness ofsaid strip, said guide wheel having a'portion of its periphery inwardlyoiset to provide a greater spacing'between said wheel and roll during aportion of each revolution of the wheel, spring means mounted adjacentto the nip between said wheel and roll and arranged to press the stripagainst the periphery of said wheel, and means for continuously feedingsaid strip.

10. Apparatus for coating a strip, comprising means for delivering acoating substance to stripmaterial traveling in laterally separatedpaths, means for propelling a strip in one of such paths in receivingrelation to said delivering means, and guide means constructed anddisposed to lead thel strip in a loop from said path to another one ofthe first-mentioned plurality of paths in receiving relation to saiddelivering means; the strip being twisted in its passage from saidguiding means to the said other path so as to present its opposite sideto the delivering means.

' WALTER P. OSGOOD.

